Thanks, I got it adjusted last night doing it that way. Did the lay-ups
tonight and hope to have it finished by end of the week.
Dan
A144
----- Original Message -----
From: "Rocketman" <topglock@cox.net>
Subject: Re: Europa-List: Stab travel range
>
> Dan Bish wrote:
>
> >
> >Hi Ferg,
> >
> >I'm just now working on installing my mass balance tower and getting the
stabs correctly aligned. My problem is that even before installing the
tower, with the weights contacting the pitch push rod, I only get 12.8 deg.
of trailing edge up pitch. When I trial fit the tower, I get 9.6 deg
trailing edge up and 6.5 deg trailing edge down. These measurements are when
using the incidence setting block. Should I use something else? I must be
doing something wrong in my measurements. Anyone who wants to throw in on
this is welcome.
> >
> >Thanks,
> >
> >Dan Bish
> >A144
> >Tucson, AZ
> >
> >-------------------------------------------------
> >Ferg wrote...
> >
> > However, just before fitting on the fuselage top, I took a last-minute
> > test of stab travel and found that in intervening months the range
of travel
> > had reduced for some reason - and I got but 2.8deg nosedown and
11.6deg
> > Noseup travel! The trim travel works well, but the stab itself has
reduced .
> > As well, I found the counterweight travel did not allow full
noseup
> > travel, and I had not cut the trim slots long enough to permit full
travel.
> > I lengthened the slots 1/8inch and the slot problem receded.
> > It was obvious I had failed to centre the TP18A swivelling rear
end of
> > the counterweight arm to allow the arm to descend slightly into a
happier
> > area, so I removed the two AN-3 bolts at the back and swivelled the
TP18A
> > four turns shorter [1/8"]. Too much!
> > So I calculated the ratios of TP18A turns (32thread) to front
end travel
> > of the counterweight and degrees of stab travel. At 2" +/- between
aft bolts
> > and 30" length of applicable c/w arm I figured one turn [1/32"
travel] of
> > TP18A equalled 1/2" change of countertweight position, and THAT
equalled
> > 2deg of stab position.
> > I'm wondering if anyone else ran into this condition, and
whether my
> > calcs gibe with another's. If all is well, I will increase the
travel of the
> > big pitch push rod to permit a greater range of stab travel [12deg
to -4deg
> > in the book].
> > Any comments gratefully received.
> > Cheers, Ferg
> > A064
> >
> >
> >
> >
>
> Dan,
>
> All it took to get A055 into shape was to lower the stop on the
> containment about 1/4". Travel is now +14 and -5. As stated earlier,
> adjustment of the mass balance arm will add to one direction and
> subtract from the other...
>
> --
> Jeff - A055
> Builders Log: http://www.N55XS.com
>
>
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